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The internal pressure of a fluid that gains speed
A) increases.
B) remains unchanged.
C) decreases.
Answer:
An electric generator
A) can create enough energy to light cities.
B) can convert mechanical energy to electric energy.
C) needs no energy source.
D) all the above
E) none of the above
Answer:
Communications and weather satellites always appear at the same place in the sky
because these satellites are
A) beyond the pull of Earth's gravitational field.
B) moving at a speed just short of escape velocity.
C) orbiting Earth with a 24-hour period.
D) stationary in space.
E) none of the above
Answer:
The intensity of cosmic rays bombarding the Earth's surface is greatest at
A) the poles.
B) mid-latitudes.
C) the equator.
D) no particular locations.
Answer:
What is the mass of a ball moving at 3 m/s with a momentum of 48 kg∙m/s?
A) 4 kg
B) 12 kg
C) 16 kg
D) 144 kg
E) none of these
Answer:
When gas in a container expands to three times its volume at constant temperature, the
gas pressure
A) is one third.
B) is one ninth.
C) triples.
D) remains the same.
Answer:
Which of the following compounds would least likely act as an acid?
A) SO4
-2
B) HSO4
-1
C) H2SO4
D) NH3
E) CH3CO2H
Answer:
Which of the following statements describes a saturated solution?
A) a solution where the solvent cannot dissolve any more solute
B) a solution of salt water with salt at the bottom
C) a carbonated beverage with bubbles
D) all of the above
E) none of the above
Answer:
The number of joules in 1 kilocalorie is
A) 4.19.
B) 41.9.
C) 4190.
D) 1054.
Answer:
Why might a small piece of chalk made of calcium carbonate be useful for alleviating
acid indigestion?
A) Calcium carbonate is a base that reacts to neutralize any excess acids.
B) Calcium carbonate is able to absorb excess acid and carry it out of the system.
C) Calcium carbonate is able to add an extra lining to the stomach to protect it from the
excess acid.
D) Calcium carbonate is able to turn the acid into a gas which can relieve the build up
of excess acid.
Answer:
Earthquake activity is associated with
A) divergent, convergent, and transform plate boundaries.
B) convergent and transform plate boundaries.
C) divergent and convergent boundaries.
D) transform plate boundaries.
Answer:
If you push an object twice as far while applying the same force, you do
A) twice as much work.
B) four times as much work.
C) the same amount of work.
Answer:
A rock with a high porosity will most likely have a
A) low permeability.
B) high permeability.
C) large proportion of open pore spaces.
D) low density.
Answer:
Which of the following is most likely to have the weakest induced dipole-induced
dipole interaction?
A) Cl2
B) Br2
C) F2
D) I2
E) All of the above have the same interactions.
Answer:
Silica has a relatively
A) low melting point.
B) high melting point.
Answer:
If an object radiates more energy than it absorbs, its
A) thermal energy decreases.
B) temperature decreases.
C) both of these
D) none of the above
Answer:
The number of nodes in a standing wave of two wavelengths, not including the
endpoints, is
A) 2.
B) 3.
C) 4.
D) 5.
E) 6.
Answer:
Account for the observation that ethyl alcohol, OH, dissolves readily in water but
dimethyl ether, C OC , which has the same number and kinds of atoms, does not.
A) The hydrogens on the dimethyl ether surround the molecule, shielding the inner
atoms from interacting with the water.
B) Because the carbons arrange themselves in a straight line, the ethanol can interact
more easily with more water molecules, thus increasing its solubility.
C) The high electronegativity of the carbon-oxygen-carbon bond on dimethyl ether
creates a strong dipole charge on the ends of the molecule, making it highly soluble in
water.
D) Because dimethyl ether lacks an -OH group, it is significantly less polar than is ethyl
alcohol and is not readily soluble in water.
Answer:
What is a molecule?
A) a group of atoms that are held together by covalent bonds
B) a group of atoms that are held together by ionic bonds
C) pair of atoms sharing a set of valence electrons
D) pair of shared valence electrons
E) group of covalent compounds held together by ionic bonds
Answer:
A mineral that is not a silicate is
A) feldspar.
B) mica.
C) calcite.
D) quartz.
Answer:
What is the predominant component of Jupiter's atmosphere?
A) hydrogen
B) helium
C) methane
D) ammonia
Answer:
Which of the following statements about carbon-14 dating is true?
A) Carbon-14 dating is very accurate because the amount of carbon-14 in the
atmosphere is constant.
B) Carbon-14 can be used to date anything younger than 50,000 years.
C) Carbon-14 dating can be used to date stone tools as well as bone.
D) all of the above
E) none of the above
Answer:
Glass is opaque to light with wave frequencies that
A) match its natural frequencies.
B) are below its natural frequencies.
C) both of these
D) none of the above
Answer:
Buoyant force acts upward on a submerged object because
A) it acts in a direction to oppose gravity.
B) if it acted downward, nothing would float.
C) the weight of fluid displaced reacts with an upward force.
D) pressure against its bottom is greater than pressure against its top.
Answer:
If it takes three carbon atoms to equal the mass of one chlorine atom, what weight of
chlorine do you need to equal the number of atoms in one kilogram of carbon?
A) 1/3 of a kg
B) 30 kg
C) 1 kg
D) 3 kg
E) 6 kg
Answer:
A 10-N falling object encounters 10 N of air resistance. The net force on it is
A) 0 N.
B) 4 N.
C) 6 N.
D) 10 N.
Answer:
Two identical tubes are filled with water, one with fresh water and one with salt water.
The pressure is greater at the bottom of the tube with
A) fresh water.
B) salt water.
C) both the same
D) depends on whether the tubes have the same cross-sectional area
Answer:
Faraday's law describes
A) electromagnetic induction.
B) the connection between current, voltage, and resistance.
C) the attraction and repulsion of magnetic poles.
D) the force between magnetic poles.
E) all of the above
Answer:
A boat loaded with scrap iron floats in a swimming pool. When the iron is thrown
overboard, the pool level will
A) rise.
B) fall.
C) remain unchanged.
Answer:
When the temperature of a fixed volume of air initially at 0 C is lowered by 1 degree,
its pressure
A) decreases by 1/273.
B) decreases by 100/273.
C) increases by 1/273.
D) increases by 100/273.
Answer:
